arch/arm/include/asm/hugetlb-3level.h

   1 /*
   2  * arch/arm/include/asm/hugetlb-3level.h
   3  *
   4  * Copyright (C) 2012 ARM Ltd.
   5  *
   6  * Based on arch/x86/include/asm/hugetlb.h.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #ifndef _ASM_ARM_HUGETLB_3LEVEL_H
  23 #define _ASM_ARM_HUGETLB_3LEVEL_H
  24
  25
  26 /*
  27  * If our huge pte is non-zero then mark the valid bit.
  28  * This allows pte_present(huge_ptep_get(ptep)) to return true for non-zero
  29  * ptes.
  30  * (The valid bit is automatically cleared by set_pte_at for PROT_NONE ptes).
  31  */
  32 static inline pte_t huge_ptep_get(pte_t *ptep)
  33 {
  34         pte_t retval = *ptep;
  35         if (pte_val(retval))
  36                 pte_val(retval) |= L_PTE_VALID;
  37         return retval;
  38 }
  39
  40 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  41                                    pte_t *ptep, pte_t pte)
  42 {
  43         set_pte_at(mm, addr, ptep, pte);
  44 }
  45
  46 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  47                                          unsigned long addr, pte_t *ptep)
  48 {
  49         ptep_clear_flush(vma, addr, ptep);
  50 }
  51
  52 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  53                                            unsigned long addr, pte_t *ptep)
  54 {
  55         ptep_set_wrprotect(mm, addr, ptep);
  56 }
  57
  58 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  59                                             unsigned long addr, pte_t *ptep)
  60 {
  61         return ptep_get_and_clear(mm, addr, ptep);
  62 }
  63
  64 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  65                                              unsigned long addr, pte_t *ptep,
  66                                              pte_t pte, int dirty)
  67 {
  68         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  69 }
  70
  71 #endif /* _ASM_ARM_HUGETLB_3LEVEL_H */